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Assertion (A): If aluminium atom s repla...

Assertion (A): If aluminium atom s replace a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquries a negative charge.
Reason(R): Aluminium is trivalent while silicon is tetravalent.

A

Both A and R are correct and R is the correct explanation of A.

B

Both A and R are correct but R is not the correct explanation of A.

C

Both A and R are not correct

D

A is not correct but R is correct.

Text Solution

Verified by Experts

The correct Answer is:
A
Reason is the correct explnation for assertion.
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DINESH PUBLICATION-P BLOCK ELEMENTS (GROUP 13 AND 14 )-Multiple choice
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  7. Aluminium vessels should not be washed with materials containing washi...

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  8. Aluminium is more reactive thant iron. But aluminium is less easily co...

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  9. BCl(3) does not exist as a dimer but BH(3) exists as B(2)H(6) because:

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  10. The difference in properties of CH(4) and SiH(4) is due to :

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  11. C Cl(4) is inert towards hydrolysis but SiCl(4) is readily hydrolysed...

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  14. The number and type of bonds between two carbon atoms in CaC(2) are:

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  15. Which has the lowest b.p?

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  18. Which is used in high temperature thermometry ?

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  19. Three centred two electron bond is present in

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  20. The most that does not give the borax bead test

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